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Air Dive - A dive conducted using air (approximately 21% oxygen & 79% nitrogen) as the breathing gas.
Alternate Display - Additional information accessible by pressing a control button.
Altitude Dive - A dive made at an elevation above 915 meters (3000 feet) where reduced no decompression and
O2 times are used for calculations, and Depth readings are adjusted.
Ascent Rate - The speed that a diver ascends toward the surface.
Ascent Rate Indicator - A bar graph that shows ascent rate as segments.
Audible Alarm - An emitted tone that alerts the diver to potential danger.
Battery Icon - A display symbol that flashes (while in Surface Mode) to indicate a Low Battery Condition.
Caution Zone - The section of the Ascent Rate Indicator that gives a visual warning of a diver’s proximity to fast
ascent rate.
Depth Sensor - an electro-mechanical device that converts water pressure into an electrical signal, that is converted
to a visual depth display.
Diagnostic Mode - The first display seen after manual activation during which time a self–check for internal faults
is performed.
Display - A visual readout of information.
Dive Memo Mode - A display of previous dive information stored in memory.
Elapsed Dive Time - The total time spent underwater during a dive.
FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture.
Icon - a small pictorial representation (symbol) of an operational mode.
LCD - Abbreviation for liquid crystal display, an easily viewed low voltage display usually found on digital
instruments.
Maximum Depth - The deepest depth attained during a dive.
Mode - A specific set of functions in an instrument.
Out of Range - The point at which an instrument can no longer supply correct dive information.
Partial Pressure - The proportion of the total pressure contributed by a single gas in a mixture of gases.
PO2 - Partial pressure of oxygen. The proportion of total pressure of a gas mixture contributed by oxygen.
Transducer - An electro-mechanical device in an instrument that acts as a depth or pressure sensor.
GLOSSARY
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